Irish authorities are liaising with Polish officials over the source of the contamination.
Traces were found at Rangeland Foods in Co Monaghan, owned by ABP Food Group.
The Group has lost contracts with:
- Co-Operative Group
- Burger King
More top news
A dry day for most with some sunshine this Saturday.
A section of the M3 has been closed and bomb disposal units are at the scene after reports of "potential hazardous material in the road".
Brexiteers have reacted angrily to Emmanuel Macron's demand Theresa May provides greater clarity over Brexit.